Music-sheet mechanism.



No. 862,608. PATENTED AUG. 6, 1907.

T. P. BROWN MUSIC SHEET MECHANISM.

APPLICATION FILED MAY 21. 1907.

UNITED STATES Ti THEODORE P. BROWN,

OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO SIMPLEX PIANO PLAYER 60., OFWORCES TER, MASSACHUSETTS.

MUSIC-SEEK LIEGHANISM.

Specification of Letters Patent.

Patented Aug. 6, 1907.

Application filed May 21. 1Q07. Serial No. 374,891.

To all whom it may concern:

Be it known that I, Tneononn P. BROWN, a citizen of the United States,residing at Worcester, in the county of Worcester and State ofMassachusetts, have invented a new and useful Music-Sheet Mechanism, ofwhich the following is a specification.

This invention relates to an adjusting device for music rolls used onpiano players and automatic pianos.

The principal objects of the invention are to provide a convenient andsimple means for accomplishing this result embodied in such a form thatthe aej listing devices can consist of only a few elements and can belocated in such a position as to occupy very little space.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to which illustrates a tion and which section.

the accompanying drawing preferred embodiment of the inven- The drawingshows the invention as applied to an ordinarytype of musical instrumentin which a rotatable and longitudinally shiftable shaft is mountedadjacent to the tracker bar 11 in aframe 12. This frame is provided witha perforation 13 having plates 14 and 15 at its ends. The shaft isprovided with a collar 16 and a spring 17 is mounted in the perforationand bears against the collar and the outside plate 15.s o as normally toforce the shaft to the right in this figure. The shaft is provided witha spool 18, as usual, on which the music sheet is wound and which has abearing in the opposite side of the frame and passes through the same.shown, connected through wheel 19. are mounted outside the bracket 21mounted on the frame. The shaft passes through the bracket and extendsbeyond the outer face of the same. It will be obvious that the spring 17will normally force the shaft over to the right until the hub of thesprocket wheel bears against the frame 21.

The purpose of this invention is to provide adjustable means for bearingon the end of the shaft to 'hold the m ne back to any desired degree'andto construct this means in a simple and inexpensive manner. For thispurpose a shaft 22 is mounted in a'bearing in the bracket 21, this shafthaving a screw-thread 23 passing hrough'a tapped bushing 24 supported bythe frame.

a chain with a sprocket shows the same in plan with parts in It isoperated by means of mechanism, not

This sprocket. wheel and brake wheel frame 12 and within a U-shaped ingbearings, a shaft On the end of this is mounted'a head 25 by means ofwhich the shaft may be adjusted in and out.

The shaft 22, is provided with a collar 26 to limit its motion in onedirection and with a disk 27 secured to the shaftand bearing on the endof the shaft 10. By turning the head 25, the position of the disk 27 canbe regulated and the motion of the shaft to the right limited so thatthe music sheet'can be adjusted to proper position with respect to thetracker bar.

On account of the end of the shaft 10 being rounded. or pointed, thebearing of the same on the disk 27 will not materially add to thefriction of the device.

While I have illustrated and described a preferred form of theinvention, I am aware that modifications .may be made therein by anyperson skilled in the art without departing from scope of the inventionas expressed in the claims. Therefore, I do not wish to be limited tothe particular form shown, but

What I do claim and desire to secure by Letters Patent is:

1. The combination with a spring-pressed'spool shaft, of adjustablemeans engaging, the free end thereof for limiting the position thereof,said adjustable means comprishig movable shaft and a disk thereonengaging the end of the spring-pressed shaft.

v 2. In a music sheet device,'the combination of a spool,

a shaft supporting said spool, :1 spring for normally forcing said shaftlongitudinally in one direction, a tapped bushing, a screw-threadedshaft 'mounted in the tapped bushing, a head on said screw threadedshaft,for adjusting it, and a disk mounfedon said screw-threaded shaftbearing on the free end of the spool shaft.

3. In a music sheet device, the combination of a tracker 30 box framehaving a perforation in one side thereof, a plate mounted on the insideof said perforation, a plate covering the outer end of said perforation,saidv plates havmounted in the-hearings in said plates, a hearing in thelar on said shaftin the THEODORE P. BROWN. Witnesses: Y 3'. Emma HALL,

Aprnnn H. SAMSON.

